img {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 50vw;
}

img.medium {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 35vw;
}

img.small {
  display: block;
  margin-left: auto;
  margin-right: auto;
  width: 20vw;
}

.content {
  width: 100%;
  margin: 0px auto;
}

.embed-container {
  height: 0;
  width: 100%;
  padding-bottom: 100%; /* play with this until right */
  overflow: hidden;
  position: relative;
}

.embed-container iframe {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
}